2 * Copyright (C) 2012 Avionic Design GmbH
3 * Copyright (C) 2012-2013 NVIDIA CORPORATION. All rights reserved.
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
10 #include <linux/module.h>
11 #include <linux/of_address.h>
12 #include <linux/of_platform.h>
14 #include <linux/dma-mapping.h>
15 #include <asm/dma-iommu.h>
20 #include "host1x_client.h"
26 #define DRIVER_NAME "tegra"
27 #define DRIVER_DESC "NVIDIA Tegra graphics"
28 #define DRIVER_DATE "20120330"
29 #define DRIVER_MAJOR 0
30 #define DRIVER_MINOR 0
31 #define DRIVER_PATCHLEVEL 0
33 struct host1x_drm_client
{
34 struct host1x_client
*client
;
35 struct device_node
*np
;
36 struct list_head list
;
39 static int host1x_add_drm_client(struct host1x_drm
*host1x
,
40 struct device_node
*np
)
42 struct host1x_drm_client
*client
;
44 client
= kzalloc(sizeof(*client
), GFP_KERNEL
);
48 INIT_LIST_HEAD(&client
->list
);
49 client
->np
= of_node_get(np
);
51 list_add_tail(&client
->list
, &host1x
->drm_clients
);
56 static int host1x_activate_drm_client(struct host1x_drm
*host1x
,
57 struct host1x_drm_client
*drm
,
58 struct host1x_client
*client
)
60 mutex_lock(&host1x
->drm_clients_lock
);
61 list_del_init(&drm
->list
);
62 list_add_tail(&drm
->list
, &host1x
->drm_active
);
64 mutex_unlock(&host1x
->drm_clients_lock
);
69 static int host1x_remove_drm_client(struct host1x_drm
*host1x
,
70 struct host1x_drm_client
*client
)
72 mutex_lock(&host1x
->drm_clients_lock
);
73 list_del_init(&client
->list
);
74 mutex_unlock(&host1x
->drm_clients_lock
);
76 of_node_put(client
->np
);
82 static int host1x_parse_dt(struct host1x_drm
*host1x
)
84 static const char * const compat
[] = {
86 "nvidia,tegra20-hdmi",
87 "nvidia,tegra20-gr2d",
89 "nvidia,tegra30-hdmi",
90 "nvidia,tegra30-gr2d",
95 for (i
= 0; i
< ARRAY_SIZE(compat
); i
++) {
96 struct device_node
*np
;
98 for_each_child_of_node(host1x
->dev
->of_node
, np
) {
99 if (of_device_is_compatible(np
, compat
[i
]) &&
100 of_device_is_available(np
)) {
101 err
= host1x_add_drm_client(host1x
, np
);
111 int host1x_drm_alloc(struct platform_device
*pdev
)
113 struct host1x_drm
*host1x
;
116 host1x
= devm_kzalloc(&pdev
->dev
, sizeof(*host1x
), GFP_KERNEL
);
120 mutex_init(&host1x
->drm_clients_lock
);
121 INIT_LIST_HEAD(&host1x
->drm_clients
);
122 INIT_LIST_HEAD(&host1x
->drm_active
);
123 mutex_init(&host1x
->clients_lock
);
124 INIT_LIST_HEAD(&host1x
->clients
);
125 host1x
->dev
= &pdev
->dev
;
127 err
= host1x_parse_dt(host1x
);
129 dev_err(&pdev
->dev
, "failed to parse DT: %d\n", err
);
133 host1x_set_drm_data(&pdev
->dev
, host1x
);
138 int host1x_drm_init(struct host1x_drm
*host1x
, struct drm_device
*drm
)
140 struct host1x_client
*client
;
142 mutex_lock(&host1x
->clients_lock
);
144 list_for_each_entry(client
, &host1x
->clients
, list
) {
145 if (client
->ops
&& client
->ops
->drm_init
) {
146 int err
= client
->ops
->drm_init(client
, drm
);
149 "DRM setup failed for %s: %d\n",
150 dev_name(client
->dev
), err
);
151 mutex_unlock(&host1x
->clients_lock
);
157 mutex_unlock(&host1x
->clients_lock
);
162 int host1x_drm_exit(struct host1x_drm
*host1x
)
164 struct platform_device
*pdev
= to_platform_device(host1x
->dev
);
165 struct host1x_client
*client
;
170 mutex_lock(&host1x
->clients_lock
);
172 list_for_each_entry_reverse(client
, &host1x
->clients
, list
) {
173 if (client
->ops
&& client
->ops
->drm_exit
) {
174 int err
= client
->ops
->drm_exit(client
);
177 "DRM cleanup failed for %s: %d\n",
178 dev_name(client
->dev
), err
);
179 mutex_unlock(&host1x
->clients_lock
);
185 mutex_unlock(&host1x
->clients_lock
);
187 drm_platform_exit(&tegra_drm_driver
, pdev
);
193 int host1x_register_client(struct host1x_drm
*host1x
,
194 struct host1x_client
*client
)
196 struct host1x_drm_client
*drm
, *tmp
;
199 mutex_lock(&host1x
->clients_lock
);
200 list_add_tail(&client
->list
, &host1x
->clients
);
201 mutex_unlock(&host1x
->clients_lock
);
203 list_for_each_entry_safe(drm
, tmp
, &host1x
->drm_clients
, list
)
204 if (drm
->np
== client
->dev
->of_node
)
205 host1x_activate_drm_client(host1x
, drm
, client
);
207 if (list_empty(&host1x
->drm_clients
)) {
208 struct platform_device
*pdev
= to_platform_device(host1x
->dev
);
210 err
= drm_platform_init(&tegra_drm_driver
, pdev
);
212 dev_err(host1x
->dev
, "drm_platform_init(): %d\n", err
);
220 int host1x_unregister_client(struct host1x_drm
*host1x
,
221 struct host1x_client
*client
)
223 struct host1x_drm_client
*drm
, *tmp
;
226 list_for_each_entry_safe(drm
, tmp
, &host1x
->drm_active
, list
) {
227 if (drm
->client
== client
) {
228 err
= host1x_drm_exit(host1x
);
230 dev_err(host1x
->dev
, "host1x_drm_exit(): %d\n",
235 host1x_remove_drm_client(host1x
, drm
);
240 mutex_lock(&host1x
->clients_lock
);
241 list_del_init(&client
->list
);
242 mutex_unlock(&host1x
->clients_lock
);
247 static int tegra_drm_load(struct drm_device
*drm
, unsigned long flags
)
249 struct host1x_drm
*host1x
;
252 host1x
= host1x_get_drm_data(drm
->dev
);
253 drm
->dev_private
= host1x
;
256 drm_mode_config_init(drm
);
258 err
= host1x_drm_init(host1x
, drm
);
263 * We don't use the drm_irq_install() helpers provided by the DRM
264 * core, so we need to set this manually in order to allow the
265 * DRM_IOCTL_WAIT_VBLANK to operate correctly.
267 drm
->irq_enabled
= 1;
269 err
= drm_vblank_init(drm
, drm
->mode_config
.num_crtc
);
273 err
= tegra_drm_fb_init(drm
);
277 drm_kms_helper_poll_init(drm
);
282 static int tegra_drm_unload(struct drm_device
*drm
)
284 drm_kms_helper_poll_fini(drm
);
285 tegra_drm_fb_exit(drm
);
287 drm_mode_config_cleanup(drm
);
292 static int tegra_drm_open(struct drm_device
*drm
, struct drm_file
*filp
)
294 struct host1x_drm_file
*fpriv
;
296 fpriv
= kzalloc(sizeof(*fpriv
), GFP_KERNEL
);
300 INIT_LIST_HEAD(&fpriv
->contexts
);
301 filp
->driver_priv
= fpriv
;
306 static void host1x_drm_context_free(struct host1x_drm_context
*context
)
308 context
->client
->ops
->close_channel(context
);
312 static void tegra_drm_lastclose(struct drm_device
*drm
)
314 struct host1x_drm
*host1x
= drm
->dev_private
;
316 tegra_fbdev_restore_mode(host1x
->fbdev
);
319 #ifdef CONFIG_DRM_TEGRA_STAGING
320 static bool host1x_drm_file_owns_context(struct host1x_drm_file
*file
,
321 struct host1x_drm_context
*context
)
323 struct host1x_drm_context
*ctx
;
325 list_for_each_entry(ctx
, &file
->contexts
, list
)
332 static int tegra_gem_create(struct drm_device
*drm
, void *data
,
333 struct drm_file
*file
)
335 struct drm_tegra_gem_create
*args
= data
;
338 bo
= tegra_bo_create_with_handle(file
, drm
, args
->size
,
346 static int tegra_gem_mmap(struct drm_device
*drm
, void *data
,
347 struct drm_file
*file
)
349 struct drm_tegra_gem_mmap
*args
= data
;
350 struct drm_gem_object
*gem
;
353 gem
= drm_gem_object_lookup(drm
, file
, args
->handle
);
357 bo
= to_tegra_bo(gem
);
359 args
->offset
= tegra_bo_get_mmap_offset(bo
);
361 drm_gem_object_unreference(gem
);
366 static int tegra_syncpt_read(struct drm_device
*drm
, void *data
,
367 struct drm_file
*file
)
369 struct drm_tegra_syncpt_read
*args
= data
;
370 struct host1x
*host
= dev_get_drvdata(drm
->dev
);
371 struct host1x_syncpt
*sp
= host1x_syncpt_get(host
, args
->id
);
376 args
->value
= host1x_syncpt_read_min(sp
);
380 static int tegra_syncpt_incr(struct drm_device
*drm
, void *data
,
381 struct drm_file
*file
)
383 struct drm_tegra_syncpt_incr
*args
= data
;
384 struct host1x
*host
= dev_get_drvdata(drm
->dev
);
385 struct host1x_syncpt
*sp
= host1x_syncpt_get(host
, args
->id
);
390 return host1x_syncpt_incr(sp
);
393 static int tegra_syncpt_wait(struct drm_device
*drm
, void *data
,
394 struct drm_file
*file
)
396 struct drm_tegra_syncpt_wait
*args
= data
;
397 struct host1x
*host
= dev_get_drvdata(drm
->dev
);
398 struct host1x_syncpt
*sp
= host1x_syncpt_get(host
, args
->id
);
403 return host1x_syncpt_wait(sp
, args
->thresh
, args
->timeout
,
407 static int tegra_open_channel(struct drm_device
*drm
, void *data
,
408 struct drm_file
*file
)
410 struct drm_tegra_open_channel
*args
= data
;
411 struct host1x_client
*client
;
412 struct host1x_drm_context
*context
;
413 struct host1x_drm_file
*fpriv
= file
->driver_priv
;
414 struct host1x_drm
*host1x
= drm
->dev_private
;
417 context
= kzalloc(sizeof(*context
), GFP_KERNEL
);
421 list_for_each_entry(client
, &host1x
->clients
, list
)
422 if (client
->class == args
->client
) {
423 err
= client
->ops
->open_channel(client
, context
);
427 context
->client
= client
;
428 list_add(&context
->list
, &fpriv
->contexts
);
429 args
->context
= (uintptr_t)context
;
437 static int tegra_close_channel(struct drm_device
*drm
, void *data
,
438 struct drm_file
*file
)
440 struct drm_tegra_close_channel
*args
= data
;
441 struct host1x_drm_file
*fpriv
= file
->driver_priv
;
442 struct host1x_drm_context
*context
=
443 (struct host1x_drm_context
*)(uintptr_t)args
->context
;
445 if (!host1x_drm_file_owns_context(fpriv
, context
))
448 list_del(&context
->list
);
449 host1x_drm_context_free(context
);
454 static int tegra_get_syncpt(struct drm_device
*drm
, void *data
,
455 struct drm_file
*file
)
457 struct drm_tegra_get_syncpt
*args
= data
;
458 struct host1x_drm_file
*fpriv
= file
->driver_priv
;
459 struct host1x_drm_context
*context
=
460 (struct host1x_drm_context
*)(uintptr_t)args
->context
;
461 struct host1x_syncpt
*syncpt
;
463 if (!host1x_drm_file_owns_context(fpriv
, context
))
466 if (args
->index
>= context
->client
->num_syncpts
)
469 syncpt
= context
->client
->syncpts
[args
->index
];
470 args
->id
= host1x_syncpt_id(syncpt
);
475 static int tegra_submit(struct drm_device
*drm
, void *data
,
476 struct drm_file
*file
)
478 struct drm_tegra_submit
*args
= data
;
479 struct host1x_drm_file
*fpriv
= file
->driver_priv
;
480 struct host1x_drm_context
*context
=
481 (struct host1x_drm_context
*)(uintptr_t)args
->context
;
483 if (!host1x_drm_file_owns_context(fpriv
, context
))
486 return context
->client
->ops
->submit(context
, args
, drm
, file
);
490 static struct drm_ioctl_desc tegra_drm_ioctls
[] = {
491 #ifdef CONFIG_DRM_TEGRA_STAGING
492 DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE
, tegra_gem_create
, DRM_UNLOCKED
| DRM_AUTH
),
493 DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP
, tegra_gem_mmap
, DRM_UNLOCKED
),
494 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ
, tegra_syncpt_read
, DRM_UNLOCKED
),
495 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR
, tegra_syncpt_incr
, DRM_UNLOCKED
),
496 DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT
, tegra_syncpt_wait
, DRM_UNLOCKED
),
497 DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL
, tegra_open_channel
, DRM_UNLOCKED
),
498 DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL
, tegra_close_channel
, DRM_UNLOCKED
),
499 DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT
, tegra_get_syncpt
, DRM_UNLOCKED
),
500 DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT
, tegra_submit
, DRM_UNLOCKED
),
504 static const struct file_operations tegra_drm_fops
= {
505 .owner
= THIS_MODULE
,
507 .release
= drm_release
,
508 .unlocked_ioctl
= drm_ioctl
,
509 .mmap
= tegra_drm_mmap
,
511 .fasync
= drm_fasync
,
514 .compat_ioctl
= drm_compat_ioctl
,
516 .llseek
= noop_llseek
,
519 static struct drm_crtc
*tegra_crtc_from_pipe(struct drm_device
*drm
, int pipe
)
521 struct drm_crtc
*crtc
;
523 list_for_each_entry(crtc
, &drm
->mode_config
.crtc_list
, head
) {
524 struct tegra_dc
*dc
= to_tegra_dc(crtc
);
526 if (dc
->pipe
== pipe
)
533 static u32
tegra_drm_get_vblank_counter(struct drm_device
*dev
, int crtc
)
535 /* TODO: implement real hardware counter using syncpoints */
536 return drm_vblank_count(dev
, crtc
);
539 static int tegra_drm_enable_vblank(struct drm_device
*drm
, int pipe
)
541 struct drm_crtc
*crtc
= tegra_crtc_from_pipe(drm
, pipe
);
542 struct tegra_dc
*dc
= to_tegra_dc(crtc
);
547 tegra_dc_enable_vblank(dc
);
552 static void tegra_drm_disable_vblank(struct drm_device
*drm
, int pipe
)
554 struct drm_crtc
*crtc
= tegra_crtc_from_pipe(drm
, pipe
);
555 struct tegra_dc
*dc
= to_tegra_dc(crtc
);
558 tegra_dc_disable_vblank(dc
);
561 static void tegra_drm_preclose(struct drm_device
*drm
, struct drm_file
*file
)
563 struct host1x_drm_file
*fpriv
= file
->driver_priv
;
564 struct host1x_drm_context
*context
, *tmp
;
565 struct drm_crtc
*crtc
;
567 list_for_each_entry(crtc
, &drm
->mode_config
.crtc_list
, head
)
568 tegra_dc_cancel_page_flip(crtc
, file
);
570 list_for_each_entry_safe(context
, tmp
, &fpriv
->contexts
, list
)
571 host1x_drm_context_free(context
);
576 #ifdef CONFIG_DEBUG_FS
577 static int tegra_debugfs_framebuffers(struct seq_file
*s
, void *data
)
579 struct drm_info_node
*node
= (struct drm_info_node
*)s
->private;
580 struct drm_device
*drm
= node
->minor
->dev
;
581 struct drm_framebuffer
*fb
;
583 mutex_lock(&drm
->mode_config
.fb_lock
);
585 list_for_each_entry(fb
, &drm
->mode_config
.fb_list
, head
) {
586 seq_printf(s
, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
587 fb
->base
.id
, fb
->width
, fb
->height
, fb
->depth
,
589 atomic_read(&fb
->refcount
.refcount
));
592 mutex_unlock(&drm
->mode_config
.fb_lock
);
597 static struct drm_info_list tegra_debugfs_list
[] = {
598 { "framebuffers", tegra_debugfs_framebuffers
, 0 },
601 static int tegra_debugfs_init(struct drm_minor
*minor
)
603 return drm_debugfs_create_files(tegra_debugfs_list
,
604 ARRAY_SIZE(tegra_debugfs_list
),
605 minor
->debugfs_root
, minor
);
608 static void tegra_debugfs_cleanup(struct drm_minor
*minor
)
610 drm_debugfs_remove_files(tegra_debugfs_list
,
611 ARRAY_SIZE(tegra_debugfs_list
), minor
);
615 struct drm_driver tegra_drm_driver
= {
616 .driver_features
= DRIVER_MODESET
| DRIVER_GEM
,
617 .load
= tegra_drm_load
,
618 .unload
= tegra_drm_unload
,
619 .open
= tegra_drm_open
,
620 .preclose
= tegra_drm_preclose
,
621 .lastclose
= tegra_drm_lastclose
,
623 .get_vblank_counter
= tegra_drm_get_vblank_counter
,
624 .enable_vblank
= tegra_drm_enable_vblank
,
625 .disable_vblank
= tegra_drm_disable_vblank
,
627 #if defined(CONFIG_DEBUG_FS)
628 .debugfs_init
= tegra_debugfs_init
,
629 .debugfs_cleanup
= tegra_debugfs_cleanup
,
632 .gem_free_object
= tegra_bo_free_object
,
633 .gem_vm_ops
= &tegra_bo_vm_ops
,
634 .dumb_create
= tegra_bo_dumb_create
,
635 .dumb_map_offset
= tegra_bo_dumb_map_offset
,
636 .dumb_destroy
= tegra_bo_dumb_destroy
,
638 .ioctls
= tegra_drm_ioctls
,
639 .num_ioctls
= ARRAY_SIZE(tegra_drm_ioctls
),
640 .fops
= &tegra_drm_fops
,
645 .major
= DRIVER_MAJOR
,
646 .minor
= DRIVER_MINOR
,
647 .patchlevel
= DRIVER_PATCHLEVEL
,